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Thread: Bosch 42# Injector Data Help Needed

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  1. #1
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    Default Bosch 42# Injector Data Help Needed

    It seems every time I crack into either truck's tune I realize a jillion things I screwed up where I last left off. The 3500 is way less wonky and, surprisingly, it's more of a longshot being a mish mash of 350 and 8.1 stuff running a 454 pretty well. Well the time has come to make it right, preferably not the hard way that I've taken before. Where I was at yesterday was a properly running truck that threw a P1665. I intend to look that up on Mitchell as I suspect it pertains to the in tank MAP sensor that this truck does not have. What this truck does now have is a 2 bar MAP sensor and 42# injectors. I slapped them in at my hangar, flashed COS3 onto the existing tune, plopped the cal back in, did the recommended things per the tutorial, adjusted IFR, and drove home. I threw a P0200 on the way home and found an open circuit on injectors 6 and 8 so the plenum comes back off tomorrow to see if I'm retarded and didn't plug them in all the way or if they somehow developed open circuits after being ohmed by me and the guy who cleaned and flowed them. I'm leaning toward the former. I have 2 spare unflowed presumably usable junkyard injectors to swap in if it's the latter. ASSuming I can get that wrapped up in a timely manner, I want to make sure I have good accurate injector data plugged in for these things. They were used on the ASA LS1 motor way back in the day, here's a link to a thread with an ASA tune and a .txt document with injector data.

    https://forum.efilive.com/showthread...e-spark-v-high

    The document was uploaded by Mr. Prick who hasn't been around in forever andit claims to be a script. If it is indeed a script, I'm dying to know what I need to run it so it plugs all this data into EFILive for me if that's how it actually works. If not, the document is terribly copy/paste unfriendly. I PM'd him a few days ago and didn't hear back which I kind of expected. He's not been on in a while. I also forgot to plug in the damn vacuum reference line so hopefully between these 2 problems the truck idles like glass. The units on the document differ from the defaults which is why I just dumped IFR from the tune in post #1 in and drove home. I want to get the timing and everything spot on for this and I do have a 4 bar FPR like the LS1 did so no need to adjust values based on that like I had to on my 1500. Plan is to put the Whipple back on when the truck is right again, preferably tomorrow.
    Last edited by Supercharged111; June 21st, 2019 at 04:40 PM.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

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